Chaturabong, Preeda

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Chaturabong, Preeda
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preeda.ch@kmitl.ac.th

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    Item type:Publication,
    Evaluation of analysis methods of the semi-circular bend (SCB) test results for measuring cracking resistance of asphalt mixtures
    (2019-09-01)
    Mandal, Tirupan
    ;
    Ling, Cheng
    ;
    Chaturabong, Preeda
    ;
    Bahia, Hussain U.
    This paper includes a large study to investigate the effect of different mixture design parameters (percent binder replacement, binder modification, low-temperature binder grade, aging, and mix design traffic level) on resistance to fracture using the Semi-Circular Bending (SCB) test at Intermediate Temperatures. The results show that the Jc parameter estimated from the SCB test cannot be directly related to the controlled parameters investigated in the study. Therefore, post-peak data analysis using the concept of Flexibility Index (FI) parameter from the Illinois Flexibility Index Test (I-FIT) is used in this study to analyze the data obtained from the SCB test. Statistical analysis (ANOVA and multi-linear regression analyses) are used to show which of the response parameters are statistically affected by mixture design factors. The study shows that although the SCB tests provide results that allow determination of various parameters such as Jc, peak load, FI parameter, and post-peak-slope, only the FI parameter can detect the effect of aging and show clear sensitivity to specific mixture design factors.
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    Evaluation of bleeding resistance in chip seal and asphalt emulsion residue rheology
    (2019-10-01)
    Chaturabong, Preeda
    Chip seal bleeding is influenced by many factors, including design inputs, material properties, and project-specific conditions. It reduces the surface texture of the pavement and thus compromises the safety of the traveling public. Even though factors that bring about premature bleeding are known, currently, no laboratory test methods for evaluating bleeding in chip seals have been specified. The objective of this paper is to present the results of an investigation of the influence factors of asphalt emulsion residue properties measured by the ASTM D7405 multiple stress creep and recovery (MSCR) test, as well as other factors related to chip seal bleeding resistance as measured by the modified loaded wheel test (MLWT). In this study, the MSCR test was used as a tool for evaluating the performance of asphalt emulsions because it has been identified as a potential test related to bleeding in the field. In addition, MLWT was selected as a tool for evaluating chip seal bleeding performance in the laboratory. The results of the MLWT showed that the emulsion application rate (EAR), aggregate gradation, and emulsion properties were significant factors affecting bleeding. The MSCR test was found to be a promising tool for the performance evaluation of asphalt emulsion residue, as the test was able to differentiate between emulsion chemistries and modifications in terms of sensitivity to both temperature and stress. In relation to chip seal bleeding resistance, only the creep compliance (J<inf>nr</inf> ) obtained from the MSCR test results was identified as a significant property affecting potential for bleeding.
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    Effective surface treatment techniques for refinishing oil-stained road surface
    (2018-01-20)
    Chaturabong, Preeda
    ;
    Lim, T. T.
    ;
    Wong, Y. D.
    Oil spillage on pavement surface is a hazard for all road users as it causes road slipperiness. Although there are various applications of oil removers for cleanup of oil spillages, many of which would require time-consuming treatment, no research has been conducted to develop temporary and fast road resurfacing technique which can be completed within a short time (1–2 h). The objective of this research is to develop a fast-setting asphalt surface treatment to respond to oil spillages on roads so as to allow resumption of traffic movements, for up to 2 days before surface rejuvenation. A series of surface treatments were selected for experimentation based on the consideration of ease of application and effectiveness to satisfy the road performance requirements. A tack coat of CRS-2 asphalt emulsion with chip seal coating was applied to refinish the oil-spilled dense- and open-graded specimens. The oil types were diesel, hydraulic oil, engine oil, and cooking oil. A British pendulum skid resistance tester was used to measure the skid resistance of the treated surfaces. The results show that using a tack coat with chip seal (CRS-2) applications to refinish the oil-spilled road can be completed within 1–1½ h. With adequate skid resistance performance, chip seal (CRS-2) application is a promising method to refinish oil-spilled road for all types of oil. A tack coat (CRS-2) application may be an option for the practitioner to use as a surface treatment to remedy oil spillage on dense-graded specimens, while asphalt emulsion alone shall not work well for oil spillage on open-graded specimens. PosiTest (pull-off tester) was carried out to determine the pull-off tensile strength of the applied surface layers, i.e., chip seal from the pavement surface. The results show that chip seal treated specimen with pre-wash yields higher pull-off tensile strength than chip seal treated specimen without pre-wash.